Oskar buchbinder and louis yogt



(No Model.)

0. BUCI-IBINDER 8v L. VOGT.

MACHINE FOR MILLING KEY SEATS.

INO. 231,833'. Patented Ju1y24, 1883.-

ATTORNY" Rs Pholwumugnphu. wuhinmon, D. c,

UNiTEn vSii/iras PATENT OFFICE.

OSKAR BUCHBINDER AND LOUS VGT, OF VIENNA, AUSTRIA-HUNGARY.

MACHINE FOR MILLING KEY-SEATS.

SPECIFICATION forming part of Letters Patent No. 281,833, dated July 24, 1883.

Application filed February 19, 1883. (No model.)

To all whom it may concern,.-

Be it known that we, OsxAR BUCHBINDER and Louis Voor, both of Vienna, Austria-Hungary, have invented certain new and useful lmprovements in Machines for Milling Key-Seats, of which the following is a specification.

Heretoforekey-seats of pulleys, gear-wheels, shafts, Src., have either been cut 'by hand with chisels, or by means of slotting-machines or similar apparatus, by which the desired grooves had to be formed gradually by a succession of cuts., rlhe accuracy of Vsuch key-seats always depended upon the skill and experience of the workman in handling1 the chisel or arranging his machine.

The object of this invention is to render the production of key-seats independent of such circumstances, and to furnish a machine by means of which keyseats of any size canbe milled with the proper degree of inclination or taper; and the invention consists of a rotary cutter to which simultaneously rectilinear motion is imparted by a sliding tube or box and a suitable 'pawland-ratchet mechanism, the sliding tube being guided in a fixed exterior and longitudinally-slotted tube, the interior surface of `which is at an inclination to the outer surface, so as to give the required taper to the key-seats.

In the accompanying drawings, Figure l is a side elevation of our improved maChineIfOrB milling key-seats, partly in sectionfto showthe interior construction. .L Fig. 2 is a plan of the machine. Fig. 3 is a vertical transverse section on line a' m, Fig. 1. Fig. 4 shows on an enlarged scale the rotary cutter and its driving-gear. Fig. 5 is a detail bottom view of the cutter shown in Fig. 4, and Fig. 6 is a vertical longitudinal section through the guide-box of the cutter, drawn on a larger scale.

Similar letters of reference indicate like parts in all the figures. I

Referring to the drawings, ct c represent the supporting-standards or head-stock of our improved machine for milling the key-seats of pulleys, gear-wheels, shafts, and similar articles. -The standards a c are provided with bearings for the mechanisms by which rotary motion isvimparted to the milling-tool or cutter e, and simultaneously rectilinear motion in the direction of the longitudinal axis ofthe the bevel-wheel m of the cutter e.

The tube d is guided bymeans of a longitudinal tongue and groove in an exterior tube or box, g, which is rigidly screwed or otherwise fastened by its inner threaded end to the socketshaped end portion f of head-stock a.

On the exterior tube or box, g, are placed loose conical blocks or jaws 71, h, which are tightened up on the articles to be milled by a nut or screw wheel, t', applied to the outer` end of the box g.

In order to be able to firmly hold articles of diEerent diameters, the blocks h h are made ilaring to one side, so that they will enter any bore wider than the outside diameter of box The lower part of the box g is thereby brought in contact with the interior surface of the article to be grooved and into a position parallel to the axis of the box.

The box g is provided at its lower part with a longitudinal slot, g', for ythe longitudinallymoving cutter c, said slot serving also as a guide for the shank of the cutter c. The bore of this cylindricaguidebox, which is shown clearly in detail in Fig. 6, is slightly inclined at an angle to the axis of the box, the axisl z z of the bore crossing the axis y y of the cylinder at the center. By this construction, when the article to be milled is heldin contact with the exterior of the box, the movable tube d, carrying the cutter, slides at an angle to the axis of the box and causes the eutterto be gradually elevated as it moves along its work, whereby a groove is formed of the required inclination or taper.

The interior tube, d, is provided with an exterior screw-thread throughout the greater part of its length. The tube d is engaged by the interior screw-thread of the extended hub c2 of a cog-wheel, c, which is located between the head-stocks ce a', its hub being extended at, both sides and supported in bearings of both head-stocks c at.;

The cog-wheel c receives rotary motion by a iixed pawl, c', at the crank end of a short intermediate shaft, c, the downwardly-extend ing crank-arm c4 of the opposite end of which is raised. by an eccentric, b, keyed to the extended hub b2 of a driving-pulley, b, to which motionis transmitted by a suitable drivingbelt.

The transmitting-shaft la of the bevel-wheel m extends longitudinally through the tube (l and the extended hubs c2 and b2 of the cog or ratchet wheel c, and of the driving-pulley b, it being splined to the latter so as to receive rotary motion while moving simultaneously in longitudinal direction through the hub of the pulley in following the motion of the interior tube, d. The rotary and rectilinear motions which are thus imparted to the cutter c by the mechanisms described produce a milled key-seat at the required point, which receives at the same time the proper degree of taper by the gradual rising of the cutter.

The machine may also be used for cutting or milling spiral key seats or grooves by placing upon the head-stock a a suitable set of gear-wheels for rotating the piece to be worked with a speed corresponding to the pitch which the groove is intended to receive.

vThe machine may also, without any material alteration, be adapted for cutting or milling key seats and grooves upon the outside of bodies-such as shafts or spindles, for vinstance by simply providing a proper bed or rest for the pieces to be worked upon and eventually a suitable stiifening or brace for box g. In this case the nut 'i and clampingjawsh have to be removed from the box g.

Having thus described our invention, we claim as new and desire to secure by Letters Patentl. The combination of a milling-tool or cutter, means for revolving the same, an interior tube supporting the cutter andhaving an exterior screw-thread, a screw-sleeve engaging the exterior thread of the cutter-tube, a pawl-andratchet mechanism for turning the sleeve and' imparting rectilinear motion to the cutter, and a iixed exterior and longitudinally-slotted guidebox provided with means for attaching the articles in which key-seats are to be milled, substantially as speciiied.

2. The combination of a cylindrical guidebox provided with a longitudinal guide-slot,

Y a cutter-tube adapted to traverse said box, and

clined jaws, one of which is adapted to slide on said cylindrical box for clamping the work,

and means for operating said jaw, substantially as described.

4L. The combination of a cylindrical guidebox provided with a longitudinal guide-slot, a cutter-tube adapted to traverse said box, a rotary cutter connected to said cutter-tube, inclined jaws, one of which is adapted to slide on said cylindrical box for clamping the work, and a nut or screw-wheel applied to the end of the guide-box for operating the clampingjaw, substantially as described.

5. The combination of a milling-tool or cutter, means for rotating the same, a cutter-tube, a screw-threaded sleeve engaging the exterior thread of the cutter-tube, a pawl-and-ratchet mechanism for turning the sleeve and imparting rectilinear motion to the cuttertube and cutter, a cylindrical guide-box provided with a longitudinal guide-slot, inclined blocks or jaws, 011e of which is adapted to slide ou said cylindrical box for clamping the work,'and means for operating said jaw, substantially as described.

In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

OSKAR BUGHBINDER. LOUIS VOG-T.

Vitnesses NVILLIAM HNING, ROBERT B. Jnivrzscrr. 

